{
  "feature_id": "F-004",
  "agent": "reviewer",
  "verdict": "APPROVED",
  "summary": "Typed config + feature flags match specs/F-004 DESIGN.md. Loader is pure and fail-fast, flags module is boundary-clean behind an interface, activation is decoupled from deployment. No regressions.",
  "checks": {
    "design_conformance": "PASS: loadConfig pure over env object (no process.env reads), ConfigError accumulates all problems, FLAG_* parsed into a record handed to the store at composition time",
    "boundary_rules": "PASS: lint:boundaries clean over 22 files; flags module imports only its own subtree (vitest in tests only); flags never imports config (inversion upheld)",
    "fail_safe_defaults": "PASS: unknown flag -> OFF; missing optional vars -> sane defaults; missing DATABASE_URL -> startup aborts before app is built",
    "test_coverage": "PASS: 15 new tests map to specs/F-004 TESTS.md incl. multi-problem aggregation and secret non-leakage; composition test proves runtime flip without redeploy",
    "regression": "PASS: unit 38 passed | 6 skipped; F-002 integration 6 passed; /health unaffected"
  },
  "findings": [
    {
      "severity": "info",
      "note": "Flags are in-memory only; restart reseeds from env. Documented as expected for this ticket; persistence is a later concern if ever needed."
    }
  ],
  "evidence": [
    "npm run lint / typecheck / lint:boundaries (22 files) / test / test:integration -> all green",
    "grep: flags module has no imports outside its subtree; config.ts has no process.env read",
    "live smoke at build stage: missing DATABASE_URL -> exit 1 with clear message; valid env -> listening + health 200",
    "files reviewed: src/infrastructure/config/**, src/modules/flags/**, src/app/build-app.ts, src/infrastructure/http/server.ts, src/app/tests/config-flags.test.ts"
  ],
  "timestamp": "2026-08-14T20:24:00Z"
}